Improvement in microscopes



R. B. TOLLES.

Microscope.

No. 198,782. Patented Jan.1,1878.

Tag 5 fizz/621151 71% 75. 119%,

In mwwm/ UNITED STATES PATENT OFFICE;

ROBERT ToLLEs, or BOSTON, MAssAoHUsET s,

IMPROV EM ENT IN MICRQS COPE S.

, Specification forming part of Letters PatntNo. 198,782, dated January 1, 1878; application filed V July 27,1877.

To all whom it may concern:

Be it known that I, ROBERT B TOLLES, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new a portion of the sub-stage illumination apparatus detached and drawn upon an enlarged scale, and modified by connecting with it a graduated arc; and Fig. 5 represents in end elevation the parts shown in Fig. 4.

My invention relates to the combination of a circular track in a plane parallel with the optical axis of the instrument and concentric with the object to be examined, with a substage carriage, upon which said track is mount- "ed and carried on guides.

It also relates to the said circular track, provided with graduations, in combination with a carriage running thereon, and carrying a con- (lensing -lens and other accessories, either singly or combined.

It also relates to a holder to carry an achromatic illuminatoror other accessory, in combination with a graduated arc and clamping device, to fix the holder at any angle to the radius that may be desired, or in the radius of the circular track.

It also relates to a convex lens, either planospherical or plano-cylindrical, in combination with a plano-concave lens, that can be caused to traverse the surface of the planoconvex lens, and an illumination-tube to direct a beam of light through the plano-concave lens.

It also relates to the convex lens and its support in the radius of the circular track, in combination with an illuminating device.

It also relates to a graduated circular track to support an illumination-tube and accessories, with the stage, to support the objectslfide, as will be more fully described herein: a ter.

In the drawings, the base or stand has jointed to it a curved arm, A, upon which the body of the instrument is mounted. It

also carries the stage S, upon which is placed the object -'slide .0. D represents a circular track mounted upon a sub-stage carriage B, connected to the arm A. This circular track is mounted and carriedv on or within guides in a plane parallel to the optical axis X X of the instrument and concentric with the object to be examined, mormted in the slide 0, so that whether the slide be above or below the stage, the object it holds shall always be in the axis of said circular track D. This track has graduation-marks placed upon it, by which the position of the carriage P, that it carries, can be set and recorded. It may also be used without graduations. Upon this carriage is mounted the sub-stage T, carrying the holder -I, to which is screwed the illumination-tube I, or other accessories.

. The spindle of the holder I can turn in its socket, and be clamped to it by the screwt in any position in which it may be placed, to carry an achromatic illuminator or other accessory, either in the radius of the track D,

or at any degree of obliquity thereto; and to of its carriage-in this instance an arm of the carriage P, which latter also carries an illmnination-tube, I, or a condenser arranged to direct a beam or pencil of light upon the plane face of the lens a. The convex lens L is mounted upon the axial end of an arm, n, which arm is in the radius of the circular track D, and is also carried by the sub-stage.

Having now fully described my invention, I claim- 1. The combination of a circular track, D,

in a plane parallel to the optical axis X X of i the instrument and coincident with theobject to be examined, with a sub-stage carria'ge, B, upon which said track is mounted in a plane parallel to the optical axis, substantially as shown and described.

2. The combination of a graduated circular track, D, with a carriage, P, running therein,

and carrying a condensing-lens and other accessories, either singly or combined, substantially as shown and described.

3. A turning-holder, I, carrying an index, M, in combination with a graduated arc, z, and a clamping device, to secure the holder either in the radius of the track D or at any degree of obliquity in which it may be placed, to carry an achromatic illuminator or other accessory, substantially as shown and described.

4. The combination of a convex lens, L, of

plano-sphericalor suitable form, with a planoconcave lens, a, of counterpart curvature, anda carriage, P, carrying said concave lens, and

ROBERT B. TOLLES.

In presence of-'- I P. S. YENDELL,

ARTHUR MONALLY. 

